| San Lorenzo de El Escorial to Orangevale (California) | 5,674.63 mi (9,132.43 km) |
| San Lorenzo de El Escorial to Orchards (Washington) | 5,366.99 mi (8,637.34 km) |
| San Lorenzo de El Escorial to Orcutt (California) | 5,837.12 mi (9,393.94 km) |
| San Lorenzo de El Escorial to Oregon (Ohio) | 3,970.04 mi (6,389.16 km) |
| San Lorenzo de El Escorial to Oregon (Wisconsin) | 4,194.67 mi (6,750.67 km) |
| San Lorenzo de El Escorial to Oregon City (Oregon) | 5,386.55 mi (8,668.82 km) |
| San Lorenzo de El Escorial to Orem (Utah) | 5,233.85 mi (8,423.07 km) |
| San Lorenzo de El Escorial to Orinda (California) | 5,750.86 mi (9,255.11 km) |
| San Lorenzo de El Escorial to Orland Park (Illinois) | 4,172.11 mi (6,714.36 km) |
| San Lorenzo de El Escorial to Orlando (Florida) | 4,334.16 mi (6,975.16 km) |
| San Lorenzo de El Escorial to Ormond Beach (Florida) | 4,291.04 mi (6,905.76 km) |
| San Lorenzo de El Escorial to Oro Valley (Arizona) | 5,569.32 mi (8,962.95 km) |
| San Lorenzo de El Escorial to Oroville (California) | 5,646.12 mi (9,086.55 km) |
| San Lorenzo de El Escorial to Oshkosh (Wisconsin) | 4,121.36 mi (6,632.69 km) |
| San Lorenzo de El Escorial to Oskaloosa (Iowa) | 4,395.60 mi (7,074.04 km) |
